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HD-FM (HD2)

Clayton Douglas said:
its my understanding HD2-fm channel coverage area is about the same as the HD1-fm channel but a lot less power is needed on HD2. right?
Click to expand...

Nope. There is no additional "power" needed to transmit the secondary channels. All the HD channels are transmitted as a single data stream, and the receiver separates them according to how they're coded.
 
Dumber's right. There's one "bit-bucket". If your reception is clean enough that you're receiving an uninterrupted bitstream, then all of the subchannels will be available. If it isn't, you'll either get analog, or nothing.
 
Clayton Douglas said:
its my understanding HD2-fm channel coverage area is about the same as the HD1-fm channel but a lot less power is needed on HD2. right?
Click to expand...

The digital signal is transmitted at a considerably lower power *than the analog*,

but that lower digital power applies to both the HD1 and HD2 (and HD3, if any) channel. (thus, as the other replies say, all HD channels have the same coverage.)

As the other replies say, there's only one digital transmission at only one power level; that one digital transmission contains all of the HD channels.
 
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